Canadian respiratory virus surveillance report: Explore the data

Update schedule: This page was last updated on ..., with data up to and including ... (surveillance week ...).

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Visualize the data

Figure 1: Percentage of tests positive in Canada by surveillance week, comparison of recent respiratory virus seasons

Figure 1: Text description

Figure 1: Data guide

• These figures compare the national weekly percentage of tests positive across recent respiratory virus seasons. Use the controls to select viruses and seasons for comparison. Use the scale buttons to select if all figures are to have the same scale (fixed) or that each figure’s scale is adjusted to fit its data (dynamic).
• Hover over or tap a figure to display weekly values and dates. Note that dates are only presented for the current season. Data are aligned across seasons by surveillance week; these weeks do not include the exact same days of the year across seasons, but do not differ by more than 7 days. For additional information, please see technical notes.

Figure 1: Data notes

• Testing practices are prone to change over time, which can affect indicators such as percentage of tests positive. Direct comparisons across seasons should be made with caution.
• RVDSS integrated SARS-CoV-2 surveillance at the beginning of the 2022-2023 season. No prior data are available for comparison.

Table 1: Respiratory virus tests and positive detections for the by for

Table 1: Data guide

• Use the controls to view lab test and detection data in greater detail for selected respiratory viruses. Data can be viewed by reporting laboratory, the level at which data are reported to RVDSS, or can be aggregated and viewed by province and territory or region. Select to view data for the current surveillance week or for the season-to-date.
• Adjust the table by selecting viruses and by using the filter to select specific reporting laboratories to view.

Table 1: Data notes

• Data represent surveillance data available at the time of analysis. Delays in the availability and reporting of data may cause data to change retrospectively.
• "N/A" is used to identify data that is not available. Data may be unavailable if it was not reported for the current surveillance week. Alternatively data may be unavailable if a reporting laboratory does not collect/report data for specific viruses.
• Some public health laboratories in Canada perform subtyping on influenza specimens from other laboratories. When identified, these subtype detections are not included in total influenza A detection counts; in these instances, total influenza A detection counts may not equal the sum of influenza A subtype detections. Total influenza A and B positive counts are used to calculate percentage of tests positive.
• Results from British Columbia comprise of specimens from the following sites: Children's and Women's Hospital Laboratory, Fraser Health Medical Microbiology Laboratory, Island Health, Providence Health Care, Vancouver Coastal Health sites, Victoria General Hospital, BCCDC Public Health Laboratory, Interior Health Authority sites, and Northern Health Authority sites.
• Abbreviations:
  • A(H1)pdm09: Influenza A(H1)pdm09
  • A(H3): Influenza A(H3N2)
  • A(UnS): Influenza A(Unsubtyped)
  • EORLA: Eastern Ontario Regional Laboratory Association
  • N/A: Not available
  • PHOL: Public Health Ontario Laboratory
  • UHN: University Health Network

Figure 2: , stratified by , scale

Figure 2: Text description

Figure 2: Data guide

• Use the controls to explore data from the current season. Explore measures of respiratory virus activity with flexibility to compare measures by virus or by region.
• Select the regions and viruses to be displayed. Use the controls to display figures separated by region or separate by virus.
• Select the measure of respiratory virus activity to be displayed and select whether all figures are to have the same scale (fixed) or if each figure’s scale is to be adjusted to fit its data (dynamic).

Figure 2: Data notes

• Different provinces and territories may use different testing practices which can affect indicators such as percentage of tests positive. Interpret with caution.